Dioptra

thumb|Graphic reconstruction of the dioptra, by Venturi, in 1814. (An incorrect interpretation of Heron's description)

In the Vinony graph

Vinony's link graph records 272 inbound references to Dioptra, and connects out to ancient Greek astronomy, Groma surveying and Greek.

Vinony files it under Ancient Greek astronomy, Angle measuring instruments and Astrometry.

Vinony links it to 19 Wikipedia language editions.

Wikidata facts

Instance of: optical instrument

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Commons category: Dioptra

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Encyclopedic overview

10 sections

Contents

Use
How it works
Advantages and disadvantages
History and development
Applications in ancient engineering
Comparison with other instruments
See also
References
Further reading
External links

thumb|Graphic reconstruction of the dioptra, by Venturi, in 1814. (An incorrect interpretation of Heron's description)

A dioptra (sometimes also named dioptre or diopter, from ) is a classical astronomical and surveying instrument, dating from the 3rd century BC. The dioptra was a sighting tube or, alternatively, a rod with a sight at both ends, attached to a stand. If fitted with protractors, it could be used to measure angles.

Excerpted from Wikipedia’s “Dioptra” article, available under the CC BY-SA 4.0 licence.